Rotary engine



Sept. 18, 1934. J. F. JAWOROWSKI ROTARY ENGINE Filed NOV. 25. 195?.

2 Sheets-Sheet l Sept. 18, 1934.

J. F. JAwo owsKl ROTARY ENGINE Filed Nov. 25. 1932 2 Sheets-Sheet 2 Patented Sept. s, 1934 v I I v 1,974,111

UNITED STATES-PATENT OFFICE ROTARY ENGINE Joseph F. Jaworowski, Cleveland, Ohio, assignor of twenty-five per cent to Samuel E. Dettelbach and twenty-five per cent to Sam Emerson, both of Cleveland, Ohio Application November 25,1932, Serial No. 644,199 2 Claims. (oi. 103-144) My invention relates to an improvement in which thus communicate with circular opening rotary engines, and more particularly to a' pump or cylinder 4.- Separate cover plates 18 and 19 or compressor comprising a circular working detachably bolted to the fianged si dgwalls a of chamber in which a rotary pistoniis adapted to 11mlL2enclose the.v opposite ends of circular operate to compress or transferaliduid or othei" chamber or cylindef"4. A chamber 20 formed 60 fluid. The general object of the 'present'inveii inbody 2 adjacent inlet passage firserves to tion is to provide a smooth running pump, strucdamp suction oscillations Qat-th intake side of cure, which may be constructed at low costs and the pump, thus reducing chattering to a minieasily assembled and disassembled, wherein a mum. Chamber 20 communicates with inlet high degree of pumping efficiencymay be mainpassage 5 and cylinder 4 through a transverse 65 tained and the life and durability of tlieiworking opening or passage 21 formed between the edge parts prolongedby cushioning; and dampening 22 of a longitudinal curved separating wall 22, the oscillations of the suction orintake side of and projecting inwardly and downwardly from the pump in SllghJL degree that the rotating flanged portions 8, and the edge 2' of body 2,

l5 blades of the pump will rotate withlitthr-orno-which body portion is interrupted at this point 70 vibration, when the pump is running. to provide communication between cylinder 4 In the accgg nanying drawings, in which I and passage 5. The chamber extends upshow a preferred form ofpump 'erribodyfig the wardly and outwardly within the confines of invention: M j ....,.cur ved wall 22 and above opening or passage 21,

20 Figure l is a transversal sectional view of the thus forming an airor gas cushioning pocket 75 pump taken orrlinel' l' of Figure 2 and showing which serves to counteract suction oscillations at the working chamber and cylindrical drive memtheintake side'of the pump caused by the variaber in elevation; I tions in suction of the rotor 24 and its set of pis- Figure 2 is a longitudinal sectional view on ten blades 25. -'I'his insures a steady flow of 25 line 2-2-;0L11'ig111:cl;., liquid through inlet passage 5 into cylinder 4. 80 Figures 3 and 4 are front alhclside elevation,;-;-As shown the central portion of the edge 22' of of the bearing member forming part of the'drive' the longitudinal curved separating wall 22 bemember; M v, tween chamber 20, inlet passage 5 and cylinder 4 Figures 5 and 6 are froiTand longitudinal secis centrally recessed along converging lines. tional views of the driving member, Figure 6 Co nsequently the opening or passage 21 de- 85 being taken on line 6-6 ofFigure 5; creases gradually in depth from its longitudinal Figure 'l is a transversal sectionalview of the center towards its ends, an arrangement which pump taken on line 7--'7 of Figureg, facilitates damping of both large and small pres- Figures 8, 9 and--10 are longit inal sectional sure oscillations. views of the pump body and cover members-when The flow of the fluid during operation of the 9o disassembled; pump is effected by the piston blades 25 and cy- .Figur,e'1 1"is a side view of the stud shaft suplindrical rotor 24 adapted to revolve or be reporting the driving member; and J Figures 12 and 13 are side views of ithegmale diameter than the circular chamber or cylinder 4 40 and female blades of the driving memberg sl. and it rotates on afixed axis offset or eccentric 95,

Referring specificallyjto the drawings iii-which to the axis of cylindeng sothat the periphery of like reference characte s designate like 'parts the rotor is always in close contact with the inner throughout thgseyeral views the pump comprises wall 7 intermediate intake and discharge open-- a cast metal body 2, having flat side walls 3 and ings 5' and 6, respectively thus cutting off direct volved within cylinder A. Rotor 24 is of smaller a. circular opening 4 extending centrally therecommunication between said passages and pro- 100 through. An intake passage 5 and ardischarge vidinga crescent-shaped working chamber 27 passage 6 communicate with circular opening or within the cylinder 4 around rotor 24. The cylinder chamber 4, and these passages are sepworking chamber is divided radially into separate arated from each other by a transverse wall 7. working compartments by three piston blades 25,

Passages 5 and 6 are at, their outer ends encirone male blade and two female blades, which ex- 105 cled by tapped flanged portions 8 and 9, respectend through longitudinal slots 28 in the cylintively, which support plates 10 and 11 secured drical wall of cylindrical rotor 24. The outer end thereto by means of set screws 12. Plates 10- edges of these.blades are curved to approximately 'd 11 are provided with axial threaded openthe same radius as the inner curved wall of cylings 14 and 15 for inlet and outlet pipes 16, 17 inder 4 and the inner enclsof theseblades are 11? hinged together or pivotally connected to a bushing 29 adapted to rotate about a pin or shaft 30, the axis of which is co-incident with the axis of cylinder 4 so that the piston blades may always maintain their radial position and rotate freely upon the axis without binding against the wall of cylinder 4. The cylindrical rotor 22 is mounted at one end upon a shaft 31 having rotatable bearing in a boss or extension 32 on cover plate 19 and this shaft extends through an adjustable packing gland 32 and is adapted to be driven by power in any desirable way. 0

The rotation imparted to rotor 24 drives the radial piston blades 25 in a circular path within cylinder 4, and constant contact of the rotor with the blades is established near the outer ends of the blades where they pass through the slots 28 in the rotor. The sides of these slots are ground to reverse inclinations to provide narrow crests 33 on opposite sides of the blades and the inner end of each slot is enlarged and the rotor itself madehollow in part to permit the inner ends of the blades to assume different angular positions in respect to rotor 24.

When the rotor revolves, the off center position of rotor 24 within cylinder 4 causes the piston blades to oscillate in respect to each other and the rotor and a relative sliding movement also occurs between the rotor and the piston blades which are merely, oscillated on the fixed pin or shaft 30 as they are forced to travel in a circular path or orbit by the rotatable movement of the rotor on its own axis which is oif center to the common axis for the cylinder and blades. A predetermined amount of fluid may thereby be pumped or transferred from the intake passage to the discharge passage through the crescent shaped working chamber 27 during each revolution of the rotor.

The pin or shaft 30 to which the piston blades are hinged is an integral oifset extension of a short shaft 34-which latter shaft is held against rotation within a hub portion 35 on cover plate 18, a pin 36 being used for such purpose. One end of the rotor is open and provided with a series of symmetrically arranged recesses 37 which seat laterally arranged extensions 38 of a sleeve or bushing 39. This bushing member fits short shaft 34 adjacent its offset portion 30 and is secured to said rotor by means of set screws 40.

The piston blades 25 are provided with'wing portions 41 adapted to operate within the longitudinal slots 28 the full length of the rotor. That is to say, the working areas of the blades are coextensive with the cylinder 4 in pump body 2, which places the end edges of the wing portions of the blades in a relatively close seating position against the flat inner walls of the cover plates 18 and 19. The narrow end portions of the piston blades provide hinge portions, which in the male piston blade embodies a single hinge 42, whereas the female piston blades show two spaced hinges 43, 43'. These hinged portions are sleeved over the bushing 29 which is sleeved over the stationary shaft or pin 30 extending axially into the cylinder 4. When the parts are assembled the connecting hinge portions for the piston blades are confined between rotor 24, and the closed hub end 44 of said rotor, but are spaced apart therefrom to permit the b'ades to oscillate freely.

The described arrangement of a suction equalizing chamber at the intake side of a pump of the kind described,- in close proximity or adjacent to the cylinder and communicating with the latter adjacent the point where the blades begin their suction action, eliminates the chattering of the blades and prevents their working against the driving rotor because the high and low peaks of the suction oscillations which commonly cause chattering are dampened or flattened out. A very quiet and steady pumping action with a minimum .of wear between the blades, rotor and cylinder walls is thus effected. chattering and other undesirable effects on the working parts of a pump due to vaporization ,of commonly known high test gasolines which have the tendency to partly vaporize under relatively low pressure are practically eliminated due to the fact that vapor is sucked from passage 5 into the chamber 20, where it is at rest sufficiently long to permit partial or complete condensation to take place each time a piston blade 25 reaches the point 2' of the cylinder wall or body 2, and cuts off communication between chamber 27 and the inlet or suction side of and into the chamber 20, thus eliminating the tendency of this moving body to back up against or slap the piston blade with chattering effect. The elimination of vapor from the gasolene passing through the pump, cuts down the tendency of the blades to chatter and permits of greater accuracy in metering the-quantity of gasolene dispensed.

Having thus described my invention, what I claim is:

1. A high speed rotary pump including a circular chamber, an intake passage for said chamber extending, laterally therefrom, a rotary member offset centrally within said chamber, piston blades carried by said rotary member within said chamber, and a suction oscillation equalizing chamber adjacent to said circular chamber below said intake passage, said equalizing chamber communicating with said intake passage and said circular chamber through an elongated opening formed in the middle portion of the inner side wall of said equalizing chamber, said opening being formed at the end of said intake passage and adjacent to said circular chamber by laterally offsetting the top portion of said inner side wall eating with said intake passage and said circular chamber through an elongated opening formed in the middle portion of the inner wall of said equalizing chamber by laterally offsetting the top portion of said inner wall with respect to the lower portion thereof, andthe width of said opening decreasing toward the opposite ends thereof.

.iosnpn F. JAWOROWSKI. 

